If I buy expensive clothes, I go to a shop.
Also, I try it and consider it.

But If I buy common clothes, I use a online mall. = But If I buy common clothes, I use an online store app.
I can't try these but it's cheaper than a offline shop. So, I often use it.
I usually go to a shop for winter season. = I usually go to a shop in the winter season.

And I often use a online mall for other clothes. = Also, I often use an online store for other clothes.

Great job, Misong!^^